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| 摘要: |
| 详细分析了微机保护中外部开关量输入电源使用不当所引起的问题，如安装调试时将外部接点输入光隔动作值设置偏低，制造时外部接点输入光隔动作值偏低等。提出了采用逆变电源的解决办法以及一些具体要求。 |
| 关键词: 微机保护 开关量 逆变电源 隔离 |
| DOI： |
| 分类号:TM77 TP36 |
| 基金项目: |
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| Maloperation of numerical relay caused by external binary input and its countermeasures |
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WANG Shu-chun DING Jian-zhong
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| Abstract: |
| The problem caused by the improper use of power supply for the binary input of external contactors is analyzed in detail,such as the action threshold of external contactor OPT is set lower during commissioning or manufacturing. It is suggested to apply DC/DC converter with some requirements. |
| Key words: numerical relay,binary input,DC / DC converter,isolation, |
